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US 2002/0171307 A1Published application
Permanent magnet motor flux rings
AssigneeBlack & Decker Inc.
InventorsBrandon Verbrugge, Robert J. Marcinkowski, Earl M. Ortt
Life of this patent
Estimating the term…
Abstract
A power tool includes a motor with a flux ring. The flux ring includes a ring member with a first and second end. The ends are positioned with respect to one another such that the ends move towards and away from one another during compressing and expanding of the ring. At least one anchor is unitarily formed with the ring. A pair of magnets are coupled with unitarily formed anchors to couple the pair of magnets with the ring. The magnets are coupled with the ring such that the ring may be compressed and expanded with the magnets secured in the ring.
Claims39
A flux ring comprising:
- a ring member having a first end and a second end, said ends positioned with respect to one another such that said ends move towards and away from one another during compressing and expanding of said ring, respectively;
- at least one anchor unitarily formed with said ring;
- at least one magnet coupled with said unitarily formed anchor for coupling said at least one magnet with said ring, said magnet being coupled with said ring such that said ring may be compressed and expanded with said at least one magnet coupled with said ring.
An electric motor comprising:
- a motor can housing;
- two end caps each coupled to said motor can housing;
- a flux ring secured with said motor can housing, said flux ring including:
- a ring member having a first end and a second end, said ends positioned with respect to one another such that said ends move towards and away from one another during compressing and expanding of said ring during assembly;
- at least one anchor unitarily formed with said ring;
- at least one magnet coupled with said unitarily formed anchor for coupling said at least one magnet with said ring, said magnet being coupled with said ring such that said ring may be compressed and expanded, during assembly, with said at least one magnet coupled with said ring;
- and
- an armature assembly positioned in said motor can housing.
5 more elements
A power tool comprising:
- a housing;
- a motor in said housing, said motor comprising:
- a motor can housing;
- two end caps each coupled to said motor can housing;
- a flux ring secured with said motor can housing, said flux ring including:
- a ring member having a first end and a second end, said ends positioned with respect to one another such that said ends move towards and away from one another during compressing and expanding of said ring during assembly;
- at least one anchor unitarily formed with said ring;
- at least one magnet coupled with said unitarily formed anchor for coupling said at least one magnet with said ring, said magnet being coupled with said ring such that said ring may be compressed and expanded, during assembly, with said at least one magnet coupled with said ring;
- an armature assembly positioned in said motor can housing;
- a power source;
- an activation member coupled with said motor and said power source for energizing and de-energizing said motor;
- and
- an output coupled with said motor such that said motor drives said output during energizing of said motor.
10 more elements
A method of manufacturing an electric motor comprising the steps of:
- forming a motor can housing;
- forming a flux ring having two ends such that said ends move toward and away from one another during compressing and expanding of said ring, a pair of magnets coupled with unitarily formed anchors on said flux ring;
- compressing, if necessary, said flux ring with said magnets such that said flux ring has an external diameter smaller than an internal diameter of said motor can housing;
- inserting said flux ring into said motor can housing;
- expanding said flux ring for frictionally engaging said motor can housing;
- securing said flux ring to said motor can housing;
- coupling a first end cap assembly to said motor can housing;
- inserting a motor armature assembly into said motor can housing;
- and
- coupling a second end cap assembly with said armature assembly and said motor can housing.
7 more elements
A method of manufacturing a power tool comprising:
- forming a motor can housing;
- forming a flux ring having two ends such that said ends move toward and away from one another during compressing and expanding of said ring, a pair of magnets coupled with unitarily formed anchors on said flux ring;
- compressing, if necessary, said flux ring with said magnets such that said flux ring has an external diameter smaller than an internal diameter of said motor can housing;
- inserting said flux ring into said motor can housing;
- expanding said flux ring for frictionally engaging said motor can housing;
- securing said flux ring to said motor can housing;
- coupling a first end cap assembly to said motor can housing;
- inserting a motor armature assembly into said motor can housing;
- coupling a second end cap assembly with said armature assembly and said motor can housing;
- providing a housing half;
- positioning said motor in said housing half;
- positioning an output in said housing half and coupling said output with said motor;
- positioning an activation member in said housing half;
- electrically coupling said activation member with said motor for energizing and de-energizing said motor which, in turn, drives said output;
- coupling a second housing half with said first housing half to form a power tool;
- and
- positioning a power source in said housing half such that said power source is electrically coupled with said motor and said activation member.
14 more elements
Dependencies are inferred from the claim text.